A company's monthly expenses (in thousands of $\text{₹}$) for five months are:
February: $85$, March: $92$, April: $78$, May: $105$, June: $110$
In which month were the expenses highest?

Let's list and compare the given monthly expenditure values:
* February = $85$
* March = $92$
* April = $78$
* May = $105$
* June = $110$

Comparing the values: $110>105>92>85>78$.
The maximum numerical expense value corresponds to the month of June.